<template>
  <div class="login_container">
      <div class="login_box">
        <!-- 头像区域 -->
        <div class="avatar_box">
          <img src="../assets/logo.png" alt="">
        </div>
        <!-- 登录表单区域 -->
        <el-form ref="loginFormRef" label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules">
          <!-- 用户名 -->
          <el-form-item prop="username">
            <el-input prefix-icon="el-icon-user-solid" v-model="loginForm.username"></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item prop="password">
            <el-input prefix-icon="el-icon-s-goods" v-model="loginForm.password" type="password"></el-input>
          </el-form-item>
          <!-- 按钮区域 -->
          <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //登录表单的数据绑定对象
      loginForm:{
        username:'admin',
        password:'123456'
      },
      //表单验证规则
      loginFormRules:{
      //验证用户名是否合法
        username:[
          { required: true, message: '请输入名字', trigger: 'blur' },
          {min: 3, max: 10, message: '名字长度应该在3到10个字符', trigger: 'blur' }
        ],
      //验证密码是否合法
        password:[ 
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {min: 6, max: 15, message: '长度应该在6到15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    //点击重置按钮，重置登录表单
    resetLoginForm(){
      // console.log(this);
      this.$refs.loginFormRef.resetFields()
    },
    login(){
      this.$refs.loginFormRef.validate(async valid=>{
        // console.log(vaild);
        if(!valid) return
        const {data:res} = await this.$http.post("login",this.loginForm)
        // console.log(res);
        if(res.meta.status !==200) return this.$message.error('登录失败')
        this.$message.success('登录成功');
        //1.将登录成之后的token，保存到客户端的sessionstorage中
        //1.1项目中出了登录之外的其他api接口，必须在登录之后才能访问
        //1.2token只应在当前网站点卡期间失效，所以将token保存在sessionstorage中
        console.log(res);
        window.sessionStorage.setItem('token',res.data.token)
        //2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}

</style>